Hostname: page-component-cd9895bd7-p9bg8 Total loading time: 0 Render date: 2024-12-26T16:02:05.037Z Has data issue: false hasContentIssue false
  • English
  • Français

Bright-red stars in the dwarf irregular galaxy Leo A

Published online by Cambridge University Press:  30 October 2019

Alina Leščinskaitė ,
Rima Stonkutė  and
Vladas Vansevičius
Alina Leščinskaitė
Affiliation:
Center for Physical Sciences and Technology, Saulėtekis av. 3, 10257 Vilnius, Lithuania, email: [email protected]
Rima Stonkutė
Affiliation:
Center for Physical Sciences and Technology, Saulėtekis av. 3, 10257 Vilnius, Lithuania, email: [email protected] Astronomical Observatory of Vilnius University, M. K. Čiurlionis st. 29, 03100 Vilnius, Lithuania, email: [email protected]
Vladas Vansevičius
Affiliation:
Center for Physical Sciences and Technology, Saulėtekis av. 3, 10257 Vilnius, Lithuania, email: [email protected] Astronomical Observatory of Vilnius University, M. K. Čiurlionis st. 29, 03100 Vilnius, Lithuania, email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We analysed a population of bright-red (BR) stars in the dwarf irregular galaxy Leo A by using multicolour photometry data obtained with the Subaru/Suprime-Cam (B, V, R, I,Hα) and HST/ACS (F475W & F814W) instruments. In order to separate the Milky Way (MW) and Leo A populations of red stars, we developed a photometric method, which enabled us to study the spatial distribution of BR stars within the Leo A galaxy.

We found a significant difference in the scale-length (S-L) of radial distributions of the “young” and “old” red giant branch (RGB) stars – 0′.82 ± 0′.04 and 1′53 ± 0′.03, respectively. Also, we determined the S-L of BR stars of 0′.85 ± 0′.05, which closely matches that of the “young” RGB stars. Additionally, we found a sequence of peculiar RGB stars and 8 dust-enshrouded stars in the Leo A galaxy.

Keywords

galaxies: dwarfgalaxies: individual (Leo A)galaxies: stellar content
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S344: Dwarf Galaxies: From the Deep Universe to the Present , August 2018 , pp. 99 - 102
Copyright
© International Astronomical Union 2019 

References

El-Badry, K., Wetzel, A., Geha, M., et al. 2016, ApJ, 820, 131 CrossRefGoogle Scholar
Jones, O. C., Maclay, M. T., Boyer, M. L., et al. 2018, ApJ, 854, 117 CrossRefGoogle Scholar
Kirby, E. N., Rizzi, L., Held, E. V., et al. 2017, ApJ, 834, 9 CrossRefGoogle Scholar
Marigo, P., Girardi, L., Bressan, A., et al. 2017, ApJ, 835, 77 CrossRefGoogle Scholar
McQuinn, K. B. W., Boyer, M. L., Mitchell, M. B., et al. 2017, ApJ, 834, 78 CrossRefGoogle Scholar
Skillman, E. D., Hidalgo, S. L., Weisz, D. R., et al. 2014, ApJ, 786, 44 CrossRefGoogle Scholar
Stonkutė, R., Arimoto, N., Hasegawa, T., et al. 2014, ApJS, 214, 19 CrossRefGoogle Scholar
Vansevičius, V., Arimoto, N., Hasegawa, T., et al. 2004, ApJ, 611, L93 CrossRefGoogle Scholar